Last updated on 12 May 2026
Tired of slow, ad-packed online file converters? I understand you. I present to you GREEN.sh : A file conversion tool that does things differently: It's fast, confidential, and really free.
No need to send anything to a server (except for videos), no size limit, and most importantly: no hidden fees or ads that pop into your face. Everything you convert - images, sounds, documents - stays quietly on your device, without going through an external cloud.
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A smart and open source tool for your daily conversions
Green is the digital equivalent of Swiss knife for your files multimedia. This online platform converts several dozen different formats for free: images, videos, audio files, … documents A wide range of possibilities!
The most beautiful? It is an open source project. Translation: No unpleasant surprises with features that become paid overnight, and your data remains confidential. No registration is required, no software to be installed. You arrive, you convert, you leave. Simple as hello.
The essential conversions of teachers on a daily basis
Images: Optimize all your educational visuals
A 15 MB school outing photo to integrate into your classroom blog? Vert.sh converts it to optimized JPEG. Need to turn PNG into WEBP to lighten your website? This is done in seconds. The tool even manages batch conversions: select all your photos of the year, and hop, resized at once.
Videos: adapt to all screens
The video of your scientific experiment does not pass on the students' tablets? Convert your MOV file to universal MP4. A parent sends you a Video in AVI theatrical performance? Direction Vert.sh to turn it into a modern format. The tool compresses smartly to keep your videos light without losing quality.
Audio: harmonize your sound resources
Are your educational podcasts in various formats? Do your students' recordings arrive in M4A, WAV, or other exotic formats? Vert.sh converts them all into universal MP3, perfect for listening on any device.
Documents: Office and LibreOffice formats
If you work with Word (.docx) or LibreOffice (.odt) documents, Vert.sh can convert them to each other. Convenient when a colleague sends you a file in a format that your software does not read correctly.
Be careful the conversion of video files is performed on remote servers. While fast and efficient, this means that the video files temporarily leave your device. Once processed, Green ensures that the files are deleted.
Instructions for use: convert to 3 time clicks
- Drag-and-drop your file on the homepage of Vert.sh
- Select the desired output format in the list
- Click on "Convert" and upload your transformed file
Time saving tip : Create a shortcut to Vert.sh on your desktop. For frequent conversions (such as MOV to MP4), the tool remembers your preferences. You can even convert multiple files all at once by selecting them all together.
Some limits to keep in mind
Vert.sh is a great tool, but it also has its limitations. The main one is undoubtedly the absence of the PDF format. The Green reel does not support PDF files. Neither to create nor to modify. If you need to convert a file to PDF or vice versa, you will need to go through another tool.
It supports a wide range of common formats, but it may not be compatible with some highly specialized, proprietary or complex file formats (for example, some CAD files like AutoCAD, or professional layout formats like InDesign.
A good tool to slip into your digital bag
We just saw him. GREEN is not the perfect tool for everything. But to convert your files in peace, without ads, without too much limitation and without taking the lead, it is a safe bet.
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